<template>
    <div>
        <!--   面包屑导航   -->
        <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
        <!--   卡片视图     -->
        <el-card>
        <!--    提示文本框        -->
            <el-alert title="添加商品信息" type="info" show-icon :closable="false" center></el-alert>
        <!--      步骤条        -->
            <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
        <!--      tab标签      -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
                <el-tabs :tab-position="'left'"  v-model="activeIndex" :before-leave="beforeLeave" @tab-click="tabClick">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_price" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类" prop="goods_cat">
                            <el-cascader
                                    expand-trigger="hover"
                                    v-model="addForm.goods_cat"
                                    :options="cateGoods"
                                    :props="propsCascader"
                                    @change="changeCascader" clearable></el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <el-form-item :label="item.attr_name" v-for="item in manyData" :key="item.attr_id">
                            <el-checkbox-group v-model="manyData">
                                <el-checkbox :label="e" v-for="(e,i) in item.attr_vals" :key="i" border checked></el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item v-for="item in onlyData" :key="item.attr_id" :label="item.attr_name">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <el-upload
                                action="http://127.0.0.1:8888/api/private/v1/upload"
                                :on-preview="handlePreview"
                                :on-remove="handleRemove"
                                list-type="picture"
                        :headers="headers" :on-success="handleSuccess">
                            <el-button size="small" type="primary">点击上传</el-button>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                        <el-button type="primary" style="margin-top:15px" @click="addGoods">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        </el-card>
        <!--    图片预览    -->
        <el-dialog
                title="图片预览"
                :visible.sync="viewDialogVisible"
                width="30%"
                >
            <img :src="viewImgPath" class="viewImg">
        </el-dialog>
    </div>
</template>

<script>
    export default {
        name: "add",
        created() {
            this.getCatesList()
        },
        data(){return{
            //当前生效的步骤
            activeIndex:'0',
            //form表单
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                goods_cat:[],
                pics:[],
                goods_introduce:'',
                attrs:[]
            },
            //form表单绑定的数据
            addFormRules:{
                goods_name:[ { required: true, message: '请输入商品名称', trigger: 'blur' },],
                goods_price:[ { required: true, message: '请输入商品价格', trigger: 'blur' },],
                goods_weight:[{ required: true, message: '请输入商品重量', trigger: 'blur' }],
                goods_number:[{ required: true, message: '请输入商品数量', trigger: 'blur' }],
                goods_cat:[{ required: true, message: '请选择商品分类', trigger: 'blur' }],
            },
            //商品分类数据
            cateGoods:[],
            //级联框的定义规则
            propsCascader:{
                value:'cat_id',
                label:'cat_name',
                children:"children"
            },
            //商品参数列表数据
            manyData:[],
            onlyData:[],
            //设置发送图片组件内容的请求头
            headers:{
                Authorization:window.sessionStorage.getItem('token')
            },
            //设置预览的图片路径
            viewImgPath:'',
            viewDialogVisible:false
        }},methods:{
            //获取列表数据
            async getCatesList(){
                var {data:res}=await this.$http.get('categories')
                if (res.meta.status!==200)return this.$message.error('数据获取错误')
                this.cateGoods=res.data
            },
            //商品分类改变
            changeCascader(){
                if (this.addForm.goods_cat.length!=3){
                    this.addForm.goods_cat=[]
                }
            },
            //tab控制是否可切换,--- return false是阻止切换
            beforeLeave(activeName,oldActiveName){
                if (oldActiveName=='0'&&this.addForm.goods_cat.length!=3){
                    this.$message.error('请选择商品分类')
                    return false
                }
            },
            //获取tab标签页的切换点击事件
            async tabClick(){
                if (this.activeIndex=='1'){
                    var {data:res}=await this.$http.get(`categories/${this.getCateId}/attributes`,{params:{sel:'many'}})
                    if (res.meta.status!==200)return this.$message.error('获取商品参数失败')
                    res.data.forEach(e=>{
                        e.attr_vals=e.attr_vals.length==0?[]:e.attr_vals.split(' ')
                    })
                    this.manyData=res.data
                }else if(this.activeIndex=='2'){
                    var {data:res}=await this.$http.get(`categories/${this.getCateId}/attributes`,{params:{sel:'only'}})
                    if (res.meta.status!==200)return this.$message.error('获取商品参数失败')
                    this.onlyData=res.data
                }
            },
            //监听上传图片预览事件
            handlePreview(file){
                this.viewDialogVisible=true
                this.viewImgPath=file.response.data.url
            },
            //监听上传图片移除事件
            handleRemove(file){
                //获取要删除的路径，根据路径找索引，找到索引删除
                var filePath=file.response.data.tmp_path
                var index=this.addForm.pics.findIndex(e=>e.pic==filePath)
                this.addForm.pics.splice(index,1)
            },
            //监听图片上传成功之后的函数
            handleSuccess(res){
                //1.拼接要push的对象
                let obj={pic:res.data.tmp_path}
                //2.push到表单要提交的数据上
                this.addForm.pics.push(obj)
            },
            //添加商品
            addGoods(){
                this.$refs.addFormRef.validate(async valid=>{
                    if(!valid)return this.$message.error('请填入必要的表单项')
                    //因为级联选择器绑定的是addform中的数据，现在要添加的是字符串，所以要进行一下深拷贝
                    var form=JSON.parse(JSON.stringify(this.addForm))
                    form.goods_cat=form.goods_cat.join(',')
                    //处理动态数据
                    this.manyData.forEach(e=>{
                        try {
                            const newInfo={attr_id:e.attr_id,
                                attr_value:e.attr_vals.join(' ')}
                            this.addForm.attrs.push(newInfo)
                        }catch (e) {

                        }

                    })
                    //处理静态数据
                    this.onlyData.forEach(e=>{
                        const newInfo={attr_id:e.attr_id,
                            attr_value:e.attr_vals}
                        this.addForm.attrs.push(newInfo)
                    })
                    form.attrs=this.addForm.attrs
                    const {data:res}=await this.$http.post('goods',form)
                    if(res.meta.status!==201)return this.$message.error('添加商品失败')
                    this.$message.success('添加商品成功')
                    this.$router.push('/goods')
                })
            }
        },
        computed:{
            getCateId(){
                if (this.addForm.goods_cat.length===3){
                    return this.addForm.goods_cat[2]
                }
                return null
            }
        }

    }
</script>

<style lang="less" scoped>
.el-steps{
    margin: 15px 0;
}
.el-checkbox{
    margin: 0 10px 0 0 !important;
}
.viewImg{
    width: 100%;
}
</style>